ML18136A272
| ML18136A272 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 11/16/1979 |
| From: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Proffitt W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 7912100201 | |
| Download: ML18136A272 (5) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION REGION II In Reply Refer To:
RII:JPO 50-338, 50-339 50-404, 50-405
~o, 50-=.ffi:>
101 MARIETTA ST., N.W., SUITE 3100 ATLANTA, GEORGIA 30303 NO\\/ 16 1979 Virginia Electric and Power Company Attn:
W. L. Proffitt Senior Vice President, Power P. O. Box 26666 Richmond, Virginia 23261 Gentlemen:
The enclosed IE Information Notice No. 79-28 provides information on the overloading of structural elements due to pipe support loads.
Sincerely,
Enclosures:
- 1.
IE Information Notice No. 79-28
- 2.
List of IE Information Notices Issued in the Last Six Months
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79121 oo ;)_O / q oP~
Virginia Electric and Power Company cc w/encl:
e W.R. Cartwright, Station Manager Post Office Box 402 Mineral, Virginia 23117 P. G. Perry -
Senior Resident Engineer Post Office Box 38 Mineral, Virginia 23117 W. L. Stewart, Manager Post Office Box 315
-_Surry, Virginia 23883 e
NOV 16 1979 UNITED STATES SSINS No.:
6870 r
Accession No.: 79102504\\5 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 November 16, 1979 IE Information Notice No. 79-28 OVERLOADING OF STRUCTURAL ELEMENTS DUE TO PIPE SUPPORT LOADS Description of Circumstances:
Recently, the NRC was informed that, in the course of the inspections pursuant to IE Bulletin No. 79-02 and 79-14 by the Portland General Electric Co. (PGE) at the Trojan Nuclear Plant, some walls were found which did not have adequate structural strength to sustain the required support reactions.
Bechtel Corporation was the Architect Engineer for the plant.
These structural inadequacies were reported to be attributable to two deficiencies:
- 1)
Apparent lack of a final check of certain pipe support locations and reactions to ensure that the supporting structural elements possessed adequate structural integrity to sustain the required loads.
- 2)
Inadequate design criteria for the reactions from supports anchored into the face of concrete block walls; e.g., relying on the combined strength of double concrete block walls without positive connection between the two walls by means other than the bond provided by a layer of grout between them.
The NRC is currently pursuing these issues in detail for the Trojan Nuclear Plant to determine the extent of these deficiencies and the generic implications for other Bechtel facilities.
This Information Notice is provided as an early notification of a possible signif-icant matter.
It is expected that recipients will review the information for possible applicability to their facilities and the actions being performed under IE Bulletin No. 79-02.
S~ecific action is being requested relating to the adequacy of attachments to concrete block walls under IE Bulletin No. 79-02, Revision 2, item 5.c.
No specific actions are requested in response to this Information Notice.
If NRC evaluations so indicate, further licensee actions may be requested or required.
If you have any questions regarding this matter, please contact the Director of the appropriate NRC Regional Office.
No written response to this IE Information Notice is required.
IE Information Notice No. 79-28 November 16, 1979 LISTING OF IE INFORMATION NOTICES ISSUED IN THE LAST SIX MONTHS Information Notice No. 79-28 79-27 79-26 79-25 79-24 79-23 79-22 79-21 79-20 (Rev. 1) 79-20 Subject Overloading of Structural Elements Due to Pipe Sup-port Loads Steam Generator Tube Ruptures at Two PWR Plants Breach of Containment Integrity Reactor Trips at Turkey Point Units 3 and 4 Overpressurization of Containment of a PWR Plant After a Main Steam Line Break Emergency Diesel Generator Lube Oil Coolers Qualification of Contrpl Systems Transportation and Commer-cial Burial of Radioactive Materials NRC Enforcement Policy NRC Licensed Individuals NRC Enforcement Policy NRC Licensed Individuals Date Issued 11/16/79 11/16/79 11/5/79 10/1/79 10/1/79 9/26/79 9/17/79 9/14/79 9/11/79 9/7/79 8/14/79 Enclosure Page 1 of 2 Issued To All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs All power reactor facilities holding OLs and CPs All Holders of CPs and OLs All Holders of CPs All Holders of OLs All Licensees as Supple-mental Information to IE Bulletin Nos. 79-19
& 79-20 Ali Holders of Reactor OLs and CPs and Production Licensees with Licensed Operators All Holders of Reactor OLs and CPs and Production Licensees with Licensed Operators
IE Information Notice No. 79-28 November 16, 1979 Information Notice No. 79-19 (Correction -
Enclosure) 79-19 79-18 79-17 79-16 79-15 79-14 79-12A LISTING OF INFORMATION NOTICES ISSUED IN THE LAST SIX MONTHS Subject Date Issued Pipe Cracks in Stagnant 7/18/79 Borated Water Systems at PWR Plants Pipe Cracks In Stagnant 7/17/79 Borated Water Systems At PWR Plants Skylab Reentry 7/6/79 Source Holder Assembly Damage 6/20/79 Damage From Misfit Between Assembly and Reactor Upper Grid Plate Nuclear Incident at Three Mile Island Deficient Procedures NRC Position of Electrical Cable Support Systems Attempted Damage to New Fuel Assemblies 6/22/79 6/7 /79 6/11/79 11/9/79 Enclosure Page 2 of 2 Issued To All Holders of Reactor OLs and CPs All Holders of Reactor OLs and CPs All Holders of Reactor OLs All Holders of Reactor OLs and CPs All Research Reactors and Test Reactors with OLs All Holders of Reactor OLs and CPs All Power Reactor Facilities with a CP All Fuel Facilities, Research Reactors, and OLs and CPs